2018 M X100D: Of the three controls for the front passenger seat position only the horizontal lever actuates seat position motors. The vertical lever and button control do nothing. I can hear relays clicking in the control box but no motors run. I suspect a fuse or lose connector as I doubt at least two motors have burned out. Any ideas where to look for fuses or connectors? The connectors visible from the front of the control box all seem snug.